Custom columns to call up metadata from epub's opf?

eosrose · 03-20-2013, 08:54 PM

I have a collection of epubs that include both author (<dc:creator opf:role="aut">) and artist (<dc:creator opf:role="art">) information in the opf. The author information displays just fine, but I think I need to create a column to display the artists. I'd rather not have to add this information from scratch. Is there any way to create a column that will read this information if it exists in the epub...?

chaley · 03-21-2013, 04:33 AM

No. Custom columns can read only the info in calibre's database for the book.

One way to get started would be to use the command line. Write a script/program that scans your library for epubs, extracts the OPF from the epub, extracts the artist information from that opf, then writes that information to a custom column using calibredb set_custom. The library scan could use a search to look for books that have not been processed, perhaps a tag or perhaps a boolean custom column.

03-20-2013, 08:54 PM	#1
eosrose Enthusiast Posts: 45 Karma: 14 Join Date: May 2010 Location: WI Device: Kobo Forma	Custom columns to call up metadata from epub's opf? I have a collection of epubs that include both author (<dc:creator opf:role="aut">) and artist (<dc:creator opf:role="art">) information in the opf. The author information displays just fine, but I think I need to create a column to display the artists. I'd rather not have to add this information from scratch. Is there any way to create a column that will read this information if it exists in the epub...?

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03-21-2013, 04:33 AM	#2
chaley Grand Sorcerer Posts: 11,734 Karma: 6690881 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	No. Custom columns can read only the info in calibre's database for the book. One way to get started would be to use the command line. Write a script/program that scans your library for epubs, extracts the OPF from the epub, extracts the artist information from that opf, then writes that information to a custom column using calibredb set_custom. The library scan could use a search to look for books that have not been processed, perhaps a tag or perhaps a boolean custom column.

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